Pen



FIG. 1 is a top perspective view of a pen showing my new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is an enlarged bottom plan view thereof; and,

FIG. 7 is an enlarged top plan view thereof.

The stippling on the grip represents a different surface texture from the rest of the pen. 

The ornamental design for a pen, as shown and described. 